<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

    <!-- select: 下拉选择  -->
    <!-- select标签是一个表单元素,  (select标签作为一个表单元素, 拥有默认的属性value) -->
    <!-- select标签必须和option公共构成一套标签  -->


    <select size="2" multiple="multiple">
        <option>学习</option>
        <option selected="selected">上课</option>
        <option>睡觉</option>
    </select>







</body>
</html>
